On June 14, 2026, the driver experienced sudden rough engine running followed immediately by a flashing check engine light. The vehicle was towed to the selling dealer, which has performed all prior maintenance. The vehicle is currently at the dealership and available for inspection. Technician notes show DTC P1326 was stored — the Knock Sensor Detection System code associated with connecting rod bearing wear on Kia's Theta II engine family. The technician performed an audible knock check only (none heard) and cleared the code. The vehicle was found approximately 2.5 quarts low on oil due to an internal turbo oil leak. The dealer's notes state the code "may be related" to low oil — hedged language, not confirmed causation. The dealer confirmed the turbo failure but has not performed a bearing clearance test to confirm or rule out bearing damage from the low oil condition. The dealer performed a turbocharger replacement. Despite a verbal commitment from the service manager that a bearing clearance test would follow, no such test was performed 40 days later. When the vehicle was declared ready, the service manager did not recall the commitment and suggested driving 40-50 miles as an alternative. Kia America opened a formal case last month and authorized a partial goodwill adjustment but no one has addressed the safety concern of the unperformed engine test indicated by the thrown code. Driving a vehicle with potential connecting rod bearing wear risks catastrophic engine failure, creating a serious safety hazard. This vehicle has a documented history of oil consumption prior to this incident. The engine has not been cleared for bearing damage following a significant low oil event and a stored P1326 code.
2021 Kia Sportage: excessive oil consumption
7 of the 54 complaints about the 2021 Kia Sportage describe excessive oil consumption.
- owner complaints
- 7
- of this car's complaints
- 13%
- recalls
- 0
Excessive oil consumption by model year
What owners say
I have experienced chronic and excessive engine oil consumption in my 2021 Kia Sportage S with the 2.4 L Theta II engine. Since around 80,000 miles, I have had to add oil every 2 weeks between oil changes to prevent the engine from running low. My vehicle now requires a complete engine replacement, estimated at $10,000. Despite regular maintenance and oil changes (documented by Express Oil Change in Pinson, AL, with service records at 81,520 mi, 88,215 mi, 94,153 mi, 96,970 mi, 98,902 mi, 101,522 mi, and 105,273 mi), the vehicle continues to lose oil rapidly. Kia and my dealer have confirmed there are no recalls or warranty campaigns for my VIN, even though this issue is identical to the well-documented engine defect affecting earlier Kia models covered under the Theta II engine settlement. This defect creates a serious safety risk, as the engine can run dangerously low on oil between services, leading to engine failure or stalling while driving. I am currently out of work recovering from surgery and cannot afford the $10,000 repair. I am requesting that the federal safety agency investigate and expand the existing Kia engine defect recalls to include 2021 Sportage models using this engine.
My vehicle is burning oil. In a little over 1500 miles after I get a oil change from the King Kia Dealership Service, my oil stick shows that the level of oil in my engine is none at all. When I check my oil, the stick, is absolutely dry. This has happened in the last 3 oil changes with my vehicle. There is no oil indicator light that comes on in the dash, but the oil stick is dry. Additionally, there is no indication of oil leaking from my car in my drive way. I will be returning to the King Kia dealer service for the third time on 10/13/25 for remedy of this situation. I contacted Kia Customer care and reported this situation and received a case number: [XXX]. I currently have 75,943 miles on my vehicle. To prevent engine damage, I've added quarts of oil to my vehicle to compensate but I'm most concerned that this oil is prematurely burning. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
My car has been burning oil way too quickly! I got the 10,000 mile oil to see if it way maybe that and by 3,000 miles there was hardly any one in there! It is not leaking out! My oil is changed faithfully! And I heard there is a recall on some newer model Kia sportages! This is craziness! I take care of my vehicle stay up on all of the maintenance! I’ve read complaints on here and there are others having the same issue it isn’t just me!
The contact owns a 2021 Kia Sportage. The vehicle was taken to an independent mechanic for an oil change, and the contact was advised that the oil level was low. The contact stated there was no warning illuminated with the oil level being low. The contact was advised by the mechanic to check the oil level more frequently. The contact had recently checked the oil level and needed to add one quart of engine oil. The contact had not taken the vehicle to a dealer to be diagnosed. The contact researched online and related the oil consumption to a known failure with the engine installed in similar vehicles. The manufacturer was not informed of the failure. The failure mileage was approximately 41,000.
My car is burning oil like crazy. I’ve had to put 2 quarts in one week. Took it to dealership because of warranty. They ran an oil consumption test and told me pistons may be bad drive it another 1000 miles then we check it again. Why not fix problems then. So I have to check my oil every day until they want to do the work I guess
The contact owns a 2021 Kia Sportage. The contact stated while driving at an undisclosed speed, the low oil light and engine warning lights illuminated. In addition, the contact stated that the vehicle had been consuming excessive engine oil. The vehicle was taken to an independent mechanic where it was diagnosed with a failed crankshaft and rocker arm. The contact was informed that the crankshaft and the rocker's arm needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
Service bulletins that may apply
- Voluntary emissions service campaign: theta II 2.4L GDI emissions: ECM logic improvement (SC340 revision 5)
- Voluntary emissions service campaign: owner notification (SC340 flight 103 / ql)
- Voluntary emissions service campaign: theta II 2.4L GDI emissions ECM logic improvement (SC340)
- Voluntary emissions service campaign: owner notification (SC340 flight 101 / ql)
- Voluntary service campaign: theta II 2.4L GDI emissions ECM logic improvement (SC340)
- Voluntary emissions service campaign: theta II 2.4L GDI emissions ECM logic improvement (SC340)
- Voluntary emissions service campaign: dealer principal memo (SC340)
- Voluntary emissions service campaign: question and answer (SC340)
Related recalls
No recalls on record for this model year.
Questions about the 2021 Kia Sportage oil consumption
Is excessive oil consumption a common problem on the 2021 Kia Sportage?
7 of 54 owner complaints about the 2021 Kia Sportage (13%) mention excessive oil consumption. The model year with the most reports is 2017.
Is there a recall or service bulletin for this on the 2021 Kia Sportage?
There are 0 recalls and 12 service bulletins for the same area of the car. Check them below with your VIN.
Other symptoms on the 2021 Kia Sportage
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